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0. E. 000K & J. MITCHELL.

HARROW TOOTH FASTENING. No. 320,334. Patented June 16, 1885.

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CHARLES E. COOK AND J OHN MITCHELL, OF DELAlVARE, OHIO.

HARROW-TOOTH FASTENING.

.SZ ECIFICATION forming part of Letters Patent No. 320,334, dated Tune 16, 1885.

(No model.)

To all: whom it may concern:

Be it known that we, CHARLES E. COOK and JOHN MrroHnLL, both of Delaware, in the county of Delaware and State of Ohio, have invented certain new and useful Improvements in Harrow-Tooth Fastenings; and wedo hereby declare that the following isa full,clear,and exact description of the invention,which will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, which form a part of this specification, and in which Figure 1 is a perspective view of our improved harrow-tooth fastening, showing the same in position for operation. Fig. 2 is a vertical transverse sectional view ofthe same, taken through the shank of the harrow-tooth. Fig. 3 is a detail view in perspective, of the clip, taken from the under side of the latter. Fig. 4 is a detail perspective view of the top plate detached. Fig. 5 is a detail perspective view of the shank of a harrowtooth used in connection with our invention, and Fig. 6 is a perspective view showing a different p0sition of the harrow-tooth when secured by our improved fastening.

The same letters refer to the same parts in all the figures.

This invention relates to fastenings for liarrow-teeth; and it has for its object to provide a device especially applicable to that class of iron harrows which are constructed with double bars or beams, which shall possess superior advantages in point of simplicity, durability, and general efficiency.

lVith these ends in view the invention consists in the improved construction and ar' rangement of parts, which will be hereinafter fully described, and particularly pointed out in the claim.

In the drawings hereto annexed, A A represent portions of two of the parallel beams or bars of a harrow to which ourinvention is applied.

B is the upper end of one of the harrow-teeth, which is square in cross-section and provided with acylindrical shank, C, the upper end of which is screw-threaded, as at D, to receive a nut or burr, E.

F designates a clip-plate of oval or other suitable shape, the edges of which are provided with upturned lips G G, fitting over the sides of the harrow-bars A A, on the under side of which the said clip-plate is adjusted. The clip plate is provided with a central opening, 11, for the bolt or threaded shank at the upper end of the barrow-tooth, and the under side of the said clip-plate is provided with a star-shaped recess, I, in which the upper end of the square portion or body of the harrow-tooth may be adjusted at various angles and held securely in any position to which it may be adjusted, so that it shall not turn in its hearings or become otherwise displaced.

J is a perforated top plate or washer fitting upon the bolt or threaded shank of the harrowtooth above the harrow bars or beams, and above this a nut, E, is adjusted, which serves to tighten and hold the harroW-tooth securely.

The operation and advantages of this invention will be readily understood from the foregoing description, taken in connection with the drawings hereto annexed. The construction is simple. The harrowtceth may be easily and quickly adjusted in any desired position upon the beams or bars of the harrow, and the teeth may be readily adjusted to and retained securely at various different anles.

b Having thus described our invention, we claim and desire to secure by Letters Patent of the United States The combination of the parallel harrowbars or beams, the harrow-tooth having a square body and a cylindrical threaded shank, a clipplate having a star-shaped recess in its under side, upturned edges, and a central perforation, a perforated plate or washer, and a fastening-nut, all arranged and operating sub stantially as and for the purpose set forth.

In testimony that we claim the foregoing as our own we have hereunto aiiixed our signatures in presence of two witnesses.

CHARLES E. COOK. JOHN MITCHELL.

\Vitn esses:

E. B. HUNT, AARON FRANTZ. 

